CN105950822A - High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof - Google Patents
High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof Download PDFInfo
- Publication number
- CN105950822A CN105950822A CN201610143472.1A CN201610143472A CN105950822A CN 105950822 A CN105950822 A CN 105950822A CN 201610143472 A CN201610143472 A CN 201610143472A CN 105950822 A CN105950822 A CN 105950822A
- Authority
- CN
- China
- Prior art keywords
- slag
- parts
- powder
- stopping
- periclase
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
Abstract
The invention discloses a high-fire-proof slag-stopping ball used for converter steelmaking and a preparation method thereof. The slag-stopping ball is prepared from the raw materials including, by weight, 26-42 parts of high-aluminum cement, 7-13 parts of white jade stone, 5-10 parts of wasted molding sand, 12-17 parts of kyanite, 10-15 parts of chromite slag, 4-9 parts of rock wool powder, 6-12 parts of periclase, 3-6 parts of colloidal graphite powder, 8-14 parts of water-quenched slag of blast furnace, 2-5 parts of sodium tungstate, 10-15 parts of Benshan green mud, 3-6 parts of calcium lignosulphonate and 5-8 parts of polyvinylpyrrolidone. In the invention, the fireproof materials, such as the white jade stone, the wasted molding sand, the kyanite, the chromite slag, the periclase and the water-quenched slag of blast furnace are composited with each other, and through a special thermal-treatment process, the slag-stopping ball has high fire-proof degree being not less than 1850 DEG C. The slag-stopping ball has strong corrosion resistance, good slag-stopping effect and good stability, can effectively reduce the content of slag in molten steel during tapping, and satisfies the demand in slag stopping and tapping.
Description
Technical field
The present invention relates to a kind of skimming ball and preparation method thereof, be specifically related to a kind of high fire-resistant skimming ball of pneumatic steelmaking and
Its preparation method.
Background technology
During converter tapping, for preventing slag from flowing in ladle, produce back sulfur rephosphorization, remove metallic inclusion in molten steel, carry
The smelting of high steel quality and the recovery rate of ferroalloy and some special steel grade of income is required to carry out pushing off the slag, so using gear
Slag ball product is protected by the pure of molten steel.
Skimming ball density, between molten steel and slag, is blocked tapping hole at the end of tapping is incited somebody to action to block slag and is flowed into ladle
In.Skimming ball is spheroplast, and outside distribution groove, in rice font, arrives tapping hole in the mode of drifting with the tide, even if at skimming ball
In the case of blocking tapping hole completely, molten steel can also flow out from groove, so that tapping tapping is more thorough.But current city
Skimming ball on field also exists the shortcoming that refractoriness is low, is easily broken, thus leverages molten steel when running into high-temperature molten steel
Pure.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of pneumatic steelmaking with high fire-resistant skimming ball and
Preparation method.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of pneumatic steelmaking, with high fire-resistant skimming ball, is made up of the raw material of following weight portion: alumina cement 26-42, white jade stone
7-13, discarded molding sand 5-10, kyanite 12-17, ferrochrome slag 10-15, rock wool powder 4-9, periclase 6-12, aquadag powder 3-
6, blast furnace water quenching slag 8-14, sodium tungstate 2-5, this mountain green mud 10-15, calcium lignosulfonate 3-6, polyvinylpyrrolidone 5-8.
The preparation method of a kind of coverter pig high efficiency composition slag former, comprises the following steps:
(1) by white jade stone, discarded molding sand, kyanite, ferrochrome slag, periclase, blast furnace water quenching slag mix homogeneously, pulverize, mistake
100-200 mesh sieve, 2000-3000r/min speed lapping 15-25min, it is heated to 560-620 DEG C the most in air atmosphere, protects
Temperature 2-3h, is cooled to room temperature, is heated to 820-880 DEG C the most in a nitrogen atmosphere, is incubated 1-2h, is cooled to room temperature, finally adds
Enter to be equivalent to the coke blacking of powder weight 4-8%, and be heated to 680-740 DEG C under an argon atmosphere, be incubated 2-3h, be cooled to room
Temperature, stand-by；
(2) powder step (1) prepared together puts into blender with remaining raw material, and adds appropriate water, is sufficiently stirred for
After Jun Yun, mixture is put in mould compressing, naturally condense 5-10h after the demoulding, then place in drying baker at 90-
It is dried 10-15h at a temperature of 100 DEG C, gets product.
Beneficial effects of the present invention:
The present invention uses the refractory material such as white jade stone, discarded molding sand, kyanite, ferrochrome slag, periclase, blast furnace water quenching slag mutual
Compound, and through the skimming ball that special Technology for Heating Processing is prepared, there are higher refractoriness, refractoriness >=1850 DEG C, the most also have
There are the advantages such as erosion resisting is strong, pushing off the slag is effective, good stability, the slag content of tapping process molten steel can be effectively reduced, meet
The demand of slag-stopping tapping.
Detailed description of the invention
A kind of pneumatic steelmaking, with high fire-resistant skimming ball, is made up of the raw material of following weight (kg): alumina cement 36, white jade
Stone 11, discarded molding sand 8, kyanite 15, ferrochrome slag 12, rock wool powder 7, periclase 8, aquadag powder 4.5, blast furnace water quenching slag
12, sodium tungstate 3, this mountain green mud 12, calcium lignosulfonate 4, polyvinylpyrrolidone 7.
The preparation method of a kind of coverter pig high efficiency composition slag former, comprises the following steps:
(1) by white jade stone, discarded molding sand, kyanite, ferrochrome slag, periclase, blast furnace water quenching slag mix homogeneously, pulverize, cross 150
Mesh sieve, 2500r/min speed lapping 20min, it is heated to 590 DEG C the most in air atmosphere, is incubated 2.5h, is cooled to room temperature,
It is heated to 860 DEG C the most in a nitrogen atmosphere, is incubated 1.5h, is cooled to room temperature, is eventually adding Jiao being equivalent to powder weight 6%
Powdered carbon, and it is heated to 720 DEG C under an argon atmosphere, it is incubated 2.5h, is cooled to room temperature, stand-by；
(2) powder step (1) prepared together puts into blender with remaining raw material, and adds appropriate water, is sufficiently stirred for
After Jun Yun, mixture is put in mould compressing, naturally condense 8h after the demoulding, then place in drying baker 95 DEG C of temperature
Degree is lower is dried 12h, gets product.
The pneumatic steelmaking that the present embodiment prepares is as shown in the table by the main performance testing result of high fire-resistant skimming ball:
| Project | Unit | Testing result |
| Bulk density | g/cm3 | 4.2 |
| Cold crushing strength | MPa | 18 |
| Refractoriness | ℃ | 1890 |
| Pushing off the slag rate | % | 98 |
Claims (2)
1. a pneumatic steelmaking is with high fire-resistant skimming ball, it is characterised in that be made up of the raw material of following weight portion: alumina cement
26-42, white jade stone 7-13, discarded molding sand 5-10, kyanite 12-17, ferrochrome slag 10-15, rock wool powder 4-9, periclase 6-
12, aquadag powder 3-6, blast furnace water quenching slag 8-14, sodium tungstate 2-5, this mountain green mud 10-15, calcium lignosulfonate 3-6, poly-second
Alkene pyrrolidone 5-8.
2. the preparation method of a coverter pig high efficiency composition slag former as claimed in claim 1, it is characterised in that include following
Step:
(1) by white jade stone, discarded molding sand, kyanite, ferrochrome slag, periclase, blast furnace water quenching slag mix homogeneously, pulverize, mistake
100-200 mesh sieve, 2000-3000r/min speed lapping 15-25min, it is heated to 560-620 DEG C the most in air atmosphere, protects
Temperature 2-3h, is cooled to room temperature, is heated to 820-880 DEG C the most in a nitrogen atmosphere, is incubated 1-2h, is cooled to room temperature, finally adds
Enter to be equivalent to the coke blacking of powder weight 4-8%, and be heated to 680-740 DEG C under an argon atmosphere, be incubated 2-3h, be cooled to room
Temperature, stand-by；
(2) powder step (1) prepared together puts into blender with remaining raw material, and adds appropriate water, is sufficiently stirred for
After Jun Yun, mixture is put in mould compressing, naturally condense 5-10h after the demoulding, then place in drying baker at 90-
It is dried 10-15h at a temperature of 100 DEG C, gets product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143472.1A CN105950822A (en) | 2016-03-07 | 2016-03-07 | High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143472.1A CN105950822A (en) | 2016-03-07 | 2016-03-07 | High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105950822A true CN105950822A (en) | 2016-09-21 |
Family
ID=56917409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610143472.1A Pending CN105950822A (en) | 2016-03-07 | 2016-03-07 | High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105950822A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495708A (en) * | 2016-10-10 | 2017-03-15 | 马鞍山豹龙新型建材有限公司 | High refractory brick of a kind of refractoriness under load and preparation method thereof |
| CN110331242A (en) * | 2019-06-04 | 2019-10-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of addition ferrochrome slag prepares coverter pig slag retaining cone |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554777A (en) * | 2003-12-26 | 2004-12-15 | 城 周 | Homogeneous slag blocking ball and its producing method |
| CN1844411A (en) * | 2006-04-30 | 2006-10-11 | 周平 | Full homogeneous barium-containing skimming ball for steel making in converter |
| CN103435362A (en) * | 2013-08-19 | 2013-12-11 | 莱芜钢铁集团泰东实业有限公司 | Fire-proof plastic material for floating plug, and preparation method thereof |
| CN103627845A (en) * | 2012-08-24 | 2014-03-12 | 河南省宏达炉业有限公司 | Homogeneous slag-stopping ball |
| CN104046721A (en) * | 2014-03-21 | 2014-09-17 | 宝钢集团新疆八一钢铁有限公司 | Slag-blocking rod for converter |
| CN105215342A (en) * | 2015-09-30 | 2016-01-06 | 江苏永钢集团有限公司 | A kind of for preventing the skimming ball of large bag vortex slag |
-
2016
- 2016-03-07 CN CN201610143472.1A patent/CN105950822A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1554777A (en) * | 2003-12-26 | 2004-12-15 | 城 周 | Homogeneous slag blocking ball and its producing method |
| CN1844411A (en) * | 2006-04-30 | 2006-10-11 | 周平 | Full homogeneous barium-containing skimming ball for steel making in converter |
| CN103627845A (en) * | 2012-08-24 | 2014-03-12 | 河南省宏达炉业有限公司 | Homogeneous slag-stopping ball |
| CN103435362A (en) * | 2013-08-19 | 2013-12-11 | 莱芜钢铁集团泰东实业有限公司 | Fire-proof plastic material for floating plug, and preparation method thereof |
| CN104046721A (en) * | 2014-03-21 | 2014-09-17 | 宝钢集团新疆八一钢铁有限公司 | Slag-blocking rod for converter |
| CN105215342A (en) * | 2015-09-30 | 2016-01-06 | 江苏永钢集团有限公司 | A kind of for preventing the skimming ball of large bag vortex slag |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106495708A (en) * | 2016-10-10 | 2017-03-15 | 马鞍山豹龙新型建材有限公司 | High refractory brick of a kind of refractoriness under load and preparation method thereof |
| CN110331242A (en) * | 2019-06-04 | 2019-10-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A method of addition ferrochrome slag prepares coverter pig slag retaining cone |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160921 |